Anatidje.] 



OSTEOLOGIA AVIUM. 



[Anatinje. 



Measurements (continued). 



Tenths. 



Length of sternum 66 



Breadth of posterior margin of sternum 29 

 Breadth of anterior margin of sternum 35 

 Depth of keel 10 



Tenths. 



Length of head 51 



Breadth of head 16 



Length of pelvis 82 



Breadth of pelvis 33 



Cygnus, Lath. 



Atratus, Lath, 



Similar to the foregoing ; as are also Minor, Pall, and Ferns, Hay, except that the 

 two latter have the sternum perforated by the trachea. 



Tadorna, Leach. 



Vulpanser, Flenn. 



Cranium similar to Anserince ; orbital septum with two foramina ; lower maxillary 

 only slightly expanded for the attachment of the masseter muscles, and with a slight 

 spine or protuberance between it and the condyle ; hinder end, beyond the condyles, 

 turned inward, and broader than in Plectropterus and other geese. 



Sternum similar to the Anserince, with a slight manubrial process. 



Pelvis similar in form to Anserince, but not so long in proportion to the size of 

 the bird. 



Wing-hones with a knob in place of a spur on the point of the carpal joint. 



Leg-bones. Metacarpus with a groove in front. 



Measurements. 



Tenths. 



Length of humerus ..... 42 



Length of ulna 41 



Length of metacarpus .... 25 



Length of femur 21 



Length of tibia 38 



Length of metatarsus 28 



Length of sternum 



43 



Tenths, 



Breadth of posterior margin of sternum 21 



Breadth of anterior margin of sternum 20 



Depth of keel 8 



Length of head . . , . . . . 38 



Breadth of head 11 



Length of pelvis 44 



Breadth of pelvis 21 



Casarka, Bon, 



Rutila, Pall, 



Very similar to Tadorna, but with the fissures on the hinder margin of the sternum 

 larger. C. Radjah is also similar. 

 206 



